Brand: Mongoose (visible MONGOOSE logo on arm)

Item: BMX one-piece crank (OPC) for bikes that use one-piece crank setups

Markings: DS-170 stamped on spindle area (indicates 170 mm arm length)

Color/Finish: Black

Material: Steel

Pedal threads: 1/2 inch (noted in photos/handwritten note)

Approx. weight: 975 g (shown on scale in photos)

Design/features: Classic one-piece crank with threaded bearing/cone sections and chainring boss

Notes from photos: Includes ruler and handwritten reference used for context; DS-170 length is from the factory stamp

Fit: Intended for BMX/old-school style setups that accept a one-piece crank; verify compatibility with your bottom bracket and pedal size